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PT-141

4.98 · 7,496+ reviews
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A melanocortin-receptor research peptide — structurally distinct from other compound classes.

PT-141 (Bremelanotide) is a synthetic cyclic 7-amino-acid peptide and an analog of alpha-MSH (alpha-melanocyte-stimulating hormone). It is studied as a melanocortin-receptor agonist (primarily MC3R and MC4R) and is one of the more distinctive peptides in its class. Supplied as a lyophilized powder for laboratory research use.

Structurally, it is derived from Melanotan II, modified at the C-terminus to remove pigmentation activity while retaining melanocortin-receptor binding. It remains one of the most studied melanocortin research peptides in the published literature. Manufactured in the USA and independently tested to ≥99% purity.

Why this one matters: What sets PT-141 apart is its structural class — it is studied as a melanocortin-receptor agonist rather than through the pathways most other compounds in this category use, which is part of why it is so widely referenced in the research literature.
CAS Number
189691-06-3
Molecular Weight
1,025.18 g/mol
Molecular Formula
C₅₀H₆₈N₁₄O₁₀
Appearance
White Lyophilized Powder
What Sets PT-141 Apart
Distinct class — a synthetic alpha-MSH analog studied as a melanocortin-receptor agonist.
Well characterized — MC3R/MC4R binding documented across published research models.
Research-grade — lyophilized powder, independently tested to ≥99% purity.
Made in the USA — every batch independently tested.
Batch Documentation
Same-Day Shipping
Discreet Packaging
Research Use Only. Not for human or veterinary use.
Lab-verified · live batch

Every batch passes four independent tests.

Lot-specific COAs. Failed batches are rejected — never shipped. You know exactly what's in the vial.

Identity Passed

Peptide sequence verified.

Purity Passed

≥99% confirmed via HPLC.

Sterility Passed

Microbial contamination screened.

Endotoxin Passed

LPS within research limits.

Trusted by researchers worldwide.

★★★★★ 4.98 / 5 · 532 reviews

Packaging is genuinely professional

Sealed, cold-packed, and clearly labeled. Everything about the presentation says they take handling seriously.

Lab-tested J.S. — San Diego, CA

Same quality every single time

Multiple orders in and the consistency hasn't slipped once. Same professional packaging, same condition on arrival.

Lab-tested M.K. — Austin, TX

Support that actually knows their stuff

Had a storage question before ordering and got a detailed, knowledgeable reply within the hour. Not a script — real expertise.

Lab-tested R.L. — Toronto, ON

Four orders deep, never disappointed

Reliability is everything to me and they deliver every time. Packaging and turnaround have been flawless across every order.

Lab-tested P.D. — Miami, FL

Issue resolved the same day

A carrier delay held up my order — reached out and they sorted it same day, no hassle. That kind of customer-first approach earns loyalty.

Lab-tested A.C. — Scottsdale, AZ

My go-to, order after order

I keep coming back because nothing about the experience changes — clean packaging, fast handling, responsive team. Consistency you can count on.

Lab-tested T.N. — New York, NY
You ask, we answer

Everything you'd want to know about Aūra.

Verification, COAs, storage, handling — and what makes Aūra different. For research use only.

How are batches verified?
Independent third-party labs verify identity, purity, sterility, and endotoxins on every batch. Failed lots are rejected and never shipped.
Are COAs available?
Yes. Each shipment includes a batch-matched Certificate of Analysis tied to your specific lot number. Digital copies are also available through our COA library or by request.
What form will my peptides arrive in?
All Aūra peptides ship as lyophilized (freeze-dried) powder in sealed vials. Reconstitution instructions are provided with your shipment.
What purity specs do you follow?
≥99% purity confirmed via HPLC on qualifying batches. Mass verified via MS. All specs available on the batch-specific COA.
How should peptides be stored?
Store lyophilized vials at -20°C, protected from light. Once reconstituted, store at 2–8°C and use within the stability window noted on the COA.
Shelf life of unopened vials?
Unopened lyophilized vials are stable for up to 24 months when stored at recommended conditions. Exact shelf life is noted per batch on the COA.
What makes Aūra different?
Every batch is independently verified, lot-matched COAs ship with every order, and our verification standard rejects any batch that fails spec — no exceptions. Built for research labs that need reproducibility.
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